The 30.5 mm pushbutton line features a zinc
die cast construction with chrome-plated
housing and mounting nut. The same
durable construction is also available with
the corrosive resistant E34 Series of
pushbuttons.

The contact blocks feature enclosed
silver contacts with pointed "reliability
nibs" for reliable performance from logic
level up to 600V. To ensure reliable
switching, nibs bite through oxide which
can form on silver contacts, eliminating
the need for expensive logic level blocks
for most applications.

Under normal environmental conditions, the
minimum operational voltage is 5V and the
minimum operational current is 1 mA,
AC/DC. For operation under a wider range of
environmental conditions, logic level contact
blocks with inert palladium tipped contacts
are recommended.

10250T Series operators have "grounding
nibs"?4 metal points on the operator
casting designed to bite through most paints
and other coatings on metal panels to
enhance the ground connection when the
operator is securely tightened.

The 10250T pushbutton
operators offer front of panel drainage via holes in the operator bushing. Hidden from
view by the mounting nut, these holes
prevent buildup of liquid inside the operator,
which can prevent operation in freezing
environments. The holes also provide a route for escaping liquid in high pressure
washdowns, effectively relieving pressure
from the internal diaphragm seal. This
ensures reliable sealing in applications even
beyond NEMA 4.